Triple level thickening complex: amplify, fortify, and strengthen Free of artificial colors, silicones, sulfates, parabens, phthalates, and drying alcohol. Biotin, coffee, and vegan collagen* are added to the formulation of this thickening clay mask to help strengthen hair and give it a noticeable lift at the roots. The kaolin clay-based mixture strengthens and nourishes hair fibers without adding weight.